from info.constants import USER_COLLECTION_MAX_NEWS
from info.models import User, News, Category
from info.utils.response_code import RET
from . import index_blu
from info import redis_store
from flask import render_template, current_app, session, request, jsonify


@index_blu.route("/news_list")
def news_list():
    """
    获取首页新闻数据
    :return:
    """
    cid = request.args.get("cid","1")
    page = request.args.get("page","1")
    per_page = request.args.get("per_page","10")

    # 校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)

    except Exception as e:

        current_app.logger.error(e)

        return jsonify(errno = RET.PARAMERR,errmsg = "参数")

    filters = []
    if cid != 1: # 查询的不是最新的数据
        filters.append(News.category_id == cid)
    # 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "数据查询错误")

    # 取到当前页的数据
    news_model_list = paginate.items # 模型对象列表
    total_page = paginate.pages
    current_page = paginate.page

    # 将模型对象列表转成字典列表
    news_dict_li = []
    for news in news_model_list:

        news_dict_li.append((news.to_basic_dict()))




    data = {

        "total_page":total_page,
        "current_page":current_page,
        "news_dict_li":news_dict_li

    }


    return jsonify(errno = RET.OK,errmsg = "OK",data = data)









# 路由设置
@index_blu.route("/")
def index():
    """
        显示首页
        1.如果用户已登录将当前登录用户的信息传到模板，供模板显示
       :return:
       """
    # 取出用户id
    user_id = session.get("user_id",None)
    # 查找模型
    user = None
    if user_id :
        try:
            user = User.query.get(user_id)
        except Exception as e:

            current_app.logger.error(e)




    # 右侧的新闻排行逻辑

    news_list = []

    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(USER_COLLECTION_MAX_NEWS)

    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []
    # 遍历对象列表，将对象字典添加到字典列表中
    for news in news_list:

        news_dict_li.append(news.to_basic_dict())

    # 查询匪类数据，通过模板的形式渲染出来
    categories = Category.query.all()

    category_li = []

    for category in categories:
        category_li.append(category.to_dict())



    data = {

        "user":user.to_dict() if user else None,
        "news_dict_li":news_dict_li,
        "category_li":category_li
    }



    return render_template("news/index.html",data=data)


#在打开网页的时候，浏览器会默认去请求根路径+favicon.ico做网站标签的小图标
# send_static_file是flask去查找指定的静态文件所调用的方法
@index_blu.route("/favicon.ico")

def favicon():

    return current_app.send_static_file("news/favicon.ico")